package mj.ocraptor.tools;

/**
 *
 *
 * @author
 */
public class AsciiTools {
  // private constructor, can't be instanciated!
  private AsciiTools() {
  }

  private static final String PLAIN_ASCII = "AaEeIiOoUu" // grave
      + "AaEeIiOoUuYy" // acute
      + "AaEeIiOoUuYy" // circumflex
      + "AaOoNn" // tilde
      + "AaEeIiOoUuYy" // umlaut
      + "Aa" // ring
      + "Cc" // cedilla
      + "OoUu" // double acute
  ;

  private static final String UNICODE = "\u00C0\u00E0\u00C8\u00E8\u00CC\u00EC\u00D2\u00F2\u00D9\u00F9"
      + "\u00C1\u00E1\u00C9\u00E9\u00CD\u00ED\u00D3\u00F3\u00DA\u00FA\u00DD\u00FD"
      + "\u00C2\u00E2\u00CA\u00EA\u00CE\u00EE\u00D4\u00F4\u00DB\u00FB\u0176\u0177"
      + "\u00C3\u00E3\u00D5\u00F5\u00D1\u00F1"
      + "\u00C4\u00E4\u00CB\u00EB\u00CF\u00EF\u00D6\u00F6\u00DC\u00FC\u0178\u00FF"
      + "\u00C5\u00E5"
      + "\u00C7\u00E7" + "\u0150\u0151\u0170\u0171";

  // remove accentued from a string and replace with ascii equivalent
  public static String convertNonAscii(String s) {
    if (s == null)
      return null;
    StringBuilder sb = new StringBuilder();
    int n = s.length();
    for (int i = 0; i < n; i++) {
      char c = s.charAt(i);
      int pos = UNICODE.indexOf(c);
      if (pos > -1) {
        sb.append(PLAIN_ASCII.charAt(pos));
      } else {
        sb.append(c);
      }
    }
    return sb.toString();
  }
}
